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Recent 14C Measurements with the Chalk River Tandem Accelerator

  • R M Brown (a1), H R Andrews (a1), G C Ball (a1), Neil Burn (a1), W G Davies (a1), Yoshio Imahori (a1), J C D Milton (a1) and Wayne Workman (a1)...

Abstract

The Chalk River Tandem Accelerator Mass Spectrometry System has reached a state of reliable measurement of 14C using 2 to 5mg elemental carbon prepared by Mg reduction of CO2. For two comparisons of a near-modern unknown with the NBS oxalic acid standard we obtain a total error of ∼±4.5%, consisting of a random system error of about ±3.5% combined with the statistical counting error. Measurements have been made on 70 samples in 30 days of running time during the past year. Samples included deep rock carbonates, cosmogenic 14C in meteorites, charcoal from earthquake fault zones, collagen of bone artifacts and fossil beetle-fragments.

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Copyright

References

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Andrews, H R, Ball, G C, Brown, R M, Davies, W G, Imahori, Y, Milton, J C D, 1980, Progress in radiocarbon dating with the Chalk River MP tandem, in : Radiocarbon, v 22, no. 3, p 822828.
Andrews, H R, Ball, G C, Brown, R M, Burn, N, Imahori, Y, Milton, J C D, Workman, W and Fireman, E L, 1982, 14C content of Antarctic meteorites measured with the Chalk River MP Tandem accelerator, in : Japan, June 27 - July 2.
Brown, R M, Andrews, H R, Ball, G C, Burn, N, Davies, W G, Imahori, Y, Milton, J C D, 1981, Radiocarbon measurements with the Chalk River MP tandem accelerator, in : IAEA symposium, West Berlin, April 6–10, IAEA, Vienna.
de Felice, J, Fazio, G G, Fireman, E L, 1963, Cosmic ray exposure age of the Farmington meteorite from radioactive isotopes: Science, v 142, p 673674.
Fireman, E L, 1978, 14C in lunar soil and meteorites, Lunar and planetary sci conf, 11th, Proc: p 16471654.
Fireman, E L, Andrews, H R, Ball, G C, Brown, R M, Burn, N, Imahori, Y, Milton, J C D, 1982, 14C terrestrial ages of Antarctic meteorites measured with counters and a Van de Graaff accelerator, in : Houston, Texas, March 15–19.
Longin, R, 1971, New method of collagen extraction for radiocarbon dating: Nature, v 230, p 241242.

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